214 results about "Pressure increase" patented technology

A method for pyrolysis of a mass of waste material, includes: providing a screw arrangement adapted to supply heat to the mass by mechanical shear; providing a reactor after the screw arrangement, adapted to supply heat to the mass in the absence of oxygen by heating the reactor wall; heating the mass to an exit temperature and increasing the pressure to an exit pressure in the screw arrangement; thermally degrading the mass in the reactor. The mass is brought into an extreme condition at the exit temperature and exit pressure by the screw arrangement, such that during the pressure drop pyrolysis occurs, thereby forming gaseous hydrocarbons within the connecting element.

The invention relates to the technical field of gas viscosity testing, in particular to a gas viscosity testing device and method suitable for multiple working conditions, the gas viscosity testing device comprises a constant temperature box, a capillary tube, a driving mechanism, a first cylinder and a second cylinder, and the first cylinder and the second cylinder have the same structure and are arranged oppositely. The device is reasonable and compact in structure, and the coaxial equal-diameter double cylinders which are oppositely mounted are adopted, so that two problems in a gas viscosity capillary method test can be solved: firstly, the gas state is adjusted, and the piston rod moves left and right by utilizing the driving mechanism, so that the volume of a rodless cavity of the cylinder is changed; in this way, the pressure increasing or reducing function can be achieved through the driving mechanism and the air cylinder, and therefore gas reaches the set pressure. The gas state is kept constant in the testing process, the first air cylinder and the second air cylinder are communicated with the capillary tube to form a closed testing loop in the testing process, the gas flow in the testing loop can be adjusted by changing the movement speed of pistons of the two air cylinders, and the requirement for conducting multiple sets of tests in the same gas state is met.

The present invention belongs to the technical field of seepage testing of coal and rock masses, and specifically discloses a coal and rock permeability measurement device and method capable of correcting the deviation of measurement values caused by adsorption. The device includes a constant temperature box, a triaxial gripper arranged in the constant temperature box, a power gas storage tank, an injection gas storage tank, a vacuum pump, a gas pressure controller, a first switch, a vacuum pump, a second switch, a third switch, a fourth switch, a downstream standard container, a fifth switch, an upstream pressure sensor, a downstream pressure sensor, a temperature sensor and a computer; based on Darcy's law and the principle of mass conservation, combined with the permeability measurement work in two stages of pressure increase and pressure decrease, the deviation of permeability measurement caused by the adsorption of injected gas in the coal and rock mass is corrected, and the problem that the traditional permeability measurement method cannot eliminate the large deviation of permeability measurement caused by gas adsorption is solved.

The invention provides a regulation and control method, system and device for a relay valve overrun test and a medium, and belongs to the technical field of air braking systems. The method comprises the steps that pressure response characteristics of a relay valve pipeline system under different opening degrees of a proportional pressure regulating valve are tested, a finite set representing pipeline dynamic response is constructed based on pressure data in a sampling period, and a dynamic matrix model is generated to describe the relation between future pressure output and control quantity; pipeline pressure output at the future moment is predicted based on the dynamic matrix model, an optimized target function is established in combination with the target boosting rate, and the optimal control quantity is solved to adjust the opening degree of the proportional pressure regulating valve in real time; comparing a predicted pressure value with an actual measurement value to obtain an error, dynamically correcting a predicted model parameter by using a weighted error sequence, and adjusting a subsequent control quantity to compensate system hysteresis and external interference; and circularly executing the processes until the pipeline pressure and the regulation and control time reach corresponding target values, and cutting off the gas source.

An injection device (2) of an injection molding machine (1) includes a heating cylinder (18) having a gas introduction port (30) and a screw (19), and a gas supply device (5) is connected to the gas introduction port (30). The gas supply device (5) includes a gas supply source (33) and a gas pressure regulating unit (34). The gas pressure regulating unit (34) regulates a gas pressure and supplies the gas when a gas from the gas supply source (33) is introduced into the gas introduction port (30). Specifically, the gas pressure is caused to change in a molding cycle and is increased to a high pressure in a metering process (61). That is, a pressure increasing period (71) in which the gas pressure increases at least partially overlaps with the metering process (61).

The invention is suitable for the technical field of cleaning. The invention discloses a water tank device with balanced internal and external pressure, which comprises a water tank body provided with a storage cavity for storing liquid, a water inlet and outlet mechanism arranged on the water tank body and communicated with the storage cavity after the water tank body is pressed, and a pressure relief mechanism capable of keeping the pressure of the water tank balanced, and the pressure relief mechanism comprises a pressure relief pipe connected with the water inlet and outlet mechanism; a buoyancy component capable of adjusting air pressure in the water tank body is arranged at the free end of the pressure relief pipe, and the pressure relief pipe is provided with a flexible structure between the water outlet pipe and the buoyancy component. Due to the fact that the pressure relief mechanism can keep the air part in the water tank communicated with the outside through the water inlet and outlet mechanism, when pressure occurs in the water tank in the cleaning process, air and clear water can be conveyed out of the water tank together, the internal pressure of the water tank is effectively reduced, the internal pressure and the external pressure of the water tank are balanced, and the pressure rise phenomenon generated in the water tank is avoided.

The invention discloses a method and a device for controlling the flow rate of pressurized air flow of a bed layer of a pressure swing adsorption device, and relates to the technical field of adsorption control. The method and the device for controlling the flow rate of the pressurized air flow of the bed layer of the pressure swing adsorption device comprise the following steps: S1, acquiring pressure difference state data in real time, and preprocessing the pressure difference state data; s2, slip sheet displacement balance is carried out on the differential pressure state data; s3, throttling opening response is conducted on the pressure difference state data; s4, setting a movement boundary of the slip sheet; and S5, the pressure difference state data, the sliding vane displacement balance result and the throttling opening response result are synthesized to execute buffer energy consumption evaluation. The problems that the throttling opening is fixed, the gas flux cannot be dynamically adjusted according to the actual working condition and the adjusting rigidity and the energy efficiency are reduced due to the fact that the front and back pressure difference change of the adsorption tower cannot be sensed in real time in the throttling process and a pressure difference driven feedback adjusting mechanism is lacked are solved.

The invention relates to the technical field of heat exchange, and discloses a plate heat exchanger which comprises an end plate, two water inlets and two water outlets are formed in the end plate, two connecting rods are installed on one side of the end plate, a clamping plate is installed on the two connecting rods in a sliding mode, and a plurality of limiting holes are formed in the two sides of the end plate and the two sides of the clamping plate. According to the plate type heat exchanger, by means of the funnel-shaped design of an inlet of the pressurizing pipe, the pressure of fluid is increased after the fluid enters the pressurizing pipe, meanwhile, the fluid forms vortex in the pressurizing pipe after passing through the flow guide plate, and therefore the pressure of the fluid is increased; the pressure of the fluid in the pressurizing pipe is further increased, the fluid is extruded by the inner wall of the pressurizing groove when entering the pressurizing groove, the flowing-out speed of the fluid is increased by the pressure in the pressurizing pipe, and the fluid is uniformly discharged from each pressurizing groove, so that the pressure and the flow speed of each section of fluid in the flow guide pipe are relatively balanced; and the fluid in each liquid storage layer is relatively uniformly distributed.

The invention relates to the technical field of material processing, and particularly relates to a control method of a cold isostatic pressing device, which realizes stable control of dynamic adjustment of pressurization, pressure maintaining and pressure relief stages through multi-parameter cooperative monitoring so as to improve the control efficiency of the cold isostatic pressing device. According to the invention, through detection from surface inspection to internal characteristics, no leakage and correct placement of materials can be ensured, pressurization safety supervision is carried out from a pressurization angle, so that the pressure in the high-pressure bin is stably increased according to a standard pressure increasing rate and a standard real-time pressure value, and the pressure in the high-pressure bin is increased along with a segmented pressure maintaining treatment process. According to the method, the control precision and strategy are adjusted in stages, the full-period requirement of materials from rapid densification to stress release is matched, the problem of excessive densification or insufficient densification caused by traditional constant-pressure pressure maintaining is solved, meanwhile, pressure relief is managed in real time, the backflow rate of hydraulic oil is controlled, and the working efficiency is improved. Material damage caused by too high speed of the high-pressure section is avoided, and the overall pressure reduction time is shortened.

The invention relates to the technical field of gas purification, and discloses a purifier positive pressure purging explosion-proof control method, which comprises the following steps: S10, system initialization and parameter setting: presetting a pressure threshold value, a flow threshold value and a multi-stage control mode through a control unit, the multi-stage control mode at least comprises three modes of quick boosting in a starting stage, pressure fine adjustment in a stable stage and pressure slow release in a shutdown stage; and S20, real-time pressure and flow detection is conducted, specifically, a pressure detection unit collects the internal pressure of the purifier cavity through a detection port and collects the external atmospheric pressure through a reference port, the actual positive pressure value of the cavity is obtained through calculation, and a flow detection unit synchronously monitors flow data of an air inlet pipeline. The positive pressure purging explosion-proof control method for the purifier aims at solving the problems that an existing positive pressure purging explosion-proof control system is insufficient in adaptability under complex working conditions, low in pressure control precision, high in energy efficiency loss and weak in safety redundancy.

The utility model discloses a full -automatic embedded part injection molding takes out piece packaging machine belongs to injection molding machine technical field, it includes work table, work table top fixed mounting has fixed mould, the fixed mould is buckled and is connected with embedded part main part, the sliding block with the guide rail sliding connection, the sliding block is located between the guide rail with the embedded part main part, the guide rail is the inclined structure, the utility model discloses through the heat absorption block absorption external heat like the heat source of mould processing, the heat transfer to first air cylinder, and the heated expansion gas (like nitrogen) in first air cylinder and second air cylinder expands in volume because temperature rises, and pressure increases, and the telescopic link of movable block outside pushes the sliding block and slides on the inclined guide rail, because the guide rail is the inclined structure, the sliding of sliding block will produce the component force along the guide rail direction, and then will embedded part main part extrude to the inboard of fixed mould, avoids in the injection molding process and causes the displacement of embedded part to influence injection molding effect.

Provided is a method for evaluating the air tightness of a case, which can achieve space saving and cost reduction and can shorten the time required for evaluating the air tightness of a plurality of cases. This method for evaluating the airtightness of a housing comprises: a first pressurization / depressurization step in which a first pump connected to a first housing via a first pipe is operated to depressurize or depressurize the inside of the first housing; a first pressure change measurement step for measuring the amount of pressure change in the first housing by means of an evaluation device connected to the first housing via a second pipe after the pressure in the first housing is stabilized; and a first evaluation step for evaluating the airtightness of the first housing by means of an evaluation device on the basis of the amount of change in pressure within the first housing, in which a first valve provided in the first pipe is opened, a second valve provided in the second pipe is closed, a first pressure increasing / decreasing step is performed, the first valve is closed, and a second pressure increasing / decreasing step is performed. A first pressure change measurement step is performed by opening the second valve.

A valve device for a power storage device that can, when a gas is generated inside the power storage device, release the gas to the outside, and can highly prevent the intrusion of moisture from an external environment, the power storage device including: a power storage device element and a housing in which the element is housed, the valve device being attached to the housing, wherein the valve device is configured to reduce an internal pressure of the housing when the pressure increases due to a gas generated inside, and in the valve device, an amount of helium leakage from a secondary side to a primary side is 5.0×10−11 Pa·m3 / sec or more and 5.0×10−6 Pa·m3 / sec or less, as measured in a 25° C. environment, in accordance with a method defined in “Vacuum spraying method (spray method)” of “Method for helium leak testing” in JIS Z 2331: 2006.

The invention discloses a raw material mixing machine stirring shaft sealing strengthening assembly which comprises an assembly sleeve, and an inner filling sleeve is fixedly connected to the interior of the assembly sleeve. Through the arrangement of the side through cavity and the inner mounting sleeve, a gas circulation cavity is formed in the side through cavity and the inner mounting sleeve after mounting, the micro pressure sensor is matched, when it is detected that the pressure in the assembly sleeve is greatly increased, the pressure in the mixing machine changes, gas is injected into the assembly sleeve through gas supply equipment, and the pressure in the mixing machine changes; the gas pressure in the assembly sleeve is increased, the static ring and the movable ring can be secondarily extruded, the sealing effect is improved, medicine in the mixer is prevented from flowing out, meanwhile, the up-down double-sealing type design is adopted, the sealing effect is further improved, meanwhile, the internal pressing force can be adjusted according to different pressure changes in the mixer, and the sealing effect is improved. Excessive abrasion of a sealing piece caused by too high pressure can be prevented, sealing failure when the pressure is reduced can be avoided, the sealing reliability is remarkably improved, and the maintenance frequency is reduced.

The utility model relates to a magnetic sealing device with high sealing performance, which is applied to the technical field of mechanical engineering sealing and realizes that under normal conditions, the temperature of a rotating shaft can be maintained within a normal range, at the moment, an elastic diaphragm cannot be contacted with a control switch even if the elastic diaphragm slightly expands and bulges due to air pressure, and when a magnetic sealing structure goes wrong, the elastic diaphragm cannot be contacted with the control switch. When the temperature of the rotating shaft rises, the air pressure on the inner side of the inner-layer cover is increased, the elastic diaphragm expands and protrudes outwards due to the increase of the air pressure, when the temperature of the rotating shaft is too high, the elastic diaphragm expands to a large degree, and when the elastic diaphragm rotates to the control switch along with the rotating shaft, the control switch is extruded and triggered, so that the alarm is triggered to remind a worker to go to overhaul; and meanwhile, the electromagnetic block is electrified through the control switch, so that the electromagnetic block is magnetically attracted through the magnetic sheet so as to be separated from the elastic diaphragm, and the elastic diaphragm is prevented from being in contact with the control switch during continuous rotation of the rotating shaft to cause abrasion to the elastic diaphragm.

The present application belongs to the field of railway technology, and relates to a turnout area snow melting and deicing device, which comprises a shell, a pressure increasing device, and a driving device connected with the pressure increasing device. The shell comprises a first cavity which is arranged as a sealed cavity. The driving device and the pressure increasing device are arranged in the first cavity. The driving device is provided with at least one gas passage. The gas passage is in communication with the outside of the first cavity at the gas inlet end, and in communication with the inside of the first cavity at the gas outlet end. The air outlet of the pressure increasing device is in communication with the outside of the shell. The driving device drives the pressure increasing device to act. Negative pressure is generated at the air inlet of the pressure increasing device. Under the action of the pressure difference between the inside and outside of the first cavity, the gas outside the first cavity enters the first cavity through the gas passage, is sucked into the pressure increasing device, is compressed in the pressure increasing device, and is sprayed out of the air outlet of the pressure increasing device. The driving device and the pressure increasing device rotate synchronously. The compressed high-pressure air is sprayed out of the air outlet of the pressure increasing device at high speed. The device is convenient to install and use.

The invention provides an air-water pressure balance experiment device and an experiment method. The air-water pressure balance experiment device comprises a cylinder body, a water pressure sensor, a water injection device and an air inflation device. In the experiment process, a soil sample can be added into the cylinder, a water source is input into the cylinder through the water injection device, so that the water source is saturated in the soil sample, then the air inflation device inflates air into the cylinder through the air injection ring, the soil sample can be filled with air along with the increase of the pressure of the inflated air, and the water source is filled into the cylinder through the air injection ring. Whether an inflation mode can play an effective role in cutting off a water source is judged by monitoring whether the water source is still discharged from the drainage pipe, the height of air in the soil sample rises upwards along with the increase of air pressure, and when the air spreads to the corresponding water pressure sensor, the pressure value of the water pressure sensor is increased along with the increase of the air. Therefore, the spreading depth of the air and the corresponding pressure value under the corresponding soil sample can be obtained, and data support is provided for later foundation pit water seepage prevention.

The utility model relates to the technical field of gas-liquid mixed transportation pressurization, in particular to a gas-liquid mixed transportation pressurization device which comprises a shell, a front cover and a rear cover, the front cover is installed on one side of the shell, the rear cover is installed on the side, away from the front cover, of the shell, an inlet is formed in one side of the upper portion of the shell, and an outlet is formed in the other side of the upper portion of the shell. When the supercharging device is used, the eccentric shaft drives the cock to slide tightly close to the interior of the shell, the shell forms a closed cavity which changes periodically, negative pressure is generated in the shell to suck a medium, the cock extrudes the medium in the shell to achieve the purpose of supercharging conveying, and the cock is tightly attached to the shell to reduce mechanical friction. And large torque is provided through an eccentric structure formed by the eccentric shaft, the cock and the interior of the shell, operation noise is reduced, and noise pollution generated when the device is used is reduced.

The application discloses a test bench, which comprises a filter, a solenoid valve, a pressure increasing valve, an exhaust valve, a pressure detector and a computer system, wherein the filter is used for filtering impurities and moisture in gas; the solenoid valve is arranged in a test pipeline and is used for controlling the opening and closing of the test pipeline; the pressure increasing valve is connected with the filter and the solenoid valve and is used for increasing the gas pressure entering the solenoid valve; the exhaust valve is connected with the test pipeline and is used for discharging gas in the test pipeline; the pressure detector is connected with the test pipeline and is used for detecting the gas pressure in the test pipeline; and the computer system is connected with the pressure detector, the solenoid valve and the exhaust valve and is used for controlling the opening and closing of the solenoid valve according to the pressure value detected by the pressure detector and controlling the opening and closing of the exhaust valve. The test bench can realize the automatic operation of the test pipeline cleaning and pressure maintaining test, thereby reducing the manual labor and improving the work efficiency.

The application discloses a pipeline structure for multistage compressor series connection, which comprises a first pipe body and a second pipe body connected with each other, a first cavity, a second cavity and a third cavity are sequentially arranged in the first pipe body along the length direction, the cross-sectional dimension of the second cavity is smaller than that of the third cavity; a fourth cavity and a fifth cavity are sequentially arranged in the second pipe body along the length direction, the cross-sectional dimension of the fourth cavity is smaller than that of the third cavity; a valve body is slidably arranged in the third cavity, the length of the valve body is smaller than the depth of the third cavity, and a flow channel communicating with the third cavity and the fourth cavity is arranged in the valve body. The application can automatically increase the pressure of the gas when the pressure of the gas is small, and can automatically make part of the gas directly jump over the pressure increasing stage when the pressure of the gas is large, which is beneficial to optimizing the load distribution and effectively improving the pressure increasing efficiency and the cycle transfer efficiency of the multistage compressor.

The invention discloses a water meter with an anti-freezing structure, and relates to the technical field of water meters. The water meter comprises a water meter shell, a decompression chamber is arranged at the bottom of the water meter shell, and the lower end of the decompression chamber is connected with a bottom cover; the bottom cover is connected with a decompression column, a decompression hole is formed in the lower end of the decompression column, and a pressure discharging hole communicated with the decompression hole is formed in the side wall of the decompression column. A pressure-bearing plate is movably inserted into the pressure-reducing column in a penetrating mode, first sealing pieces are arranged between the pressure-bearing plate and the pressure-reducing chamber and between the pressure-bearing plate and the pressure-reducing column, the pressure-bearing plate is supported upwards through the compression spring, the pressure-bearing plate is used for blocking the pressure discharge hole, and when the pressure in the water meter shell is increased and the pressure-bearing plate is squeezed downwards, water in the water meter shell is discharged through the pressure discharge hole and the pressure relief hole. And pressure relief in the water meter shell is achieved. The pressure-bearing plate is downwards squeezed and pushed by increasing the icing pressure in the water meter, so that the pressure in the water meter shell is relieved through the pressure discharge hole and the pressure relief hole, and the problems that an existing water meter is anti-freezing through heating, the overall structure is complex, and the use cost is high are solved.

The utility model relates to the technical field of micro-water sensors, in particular to a precise micro-water sensor. According to the technical scheme, the pressure relief device comprises a device body, an air inlet and an air outlet are formed in the device body, the pressure relief device further comprises a pressure relief compensation module installed on the air inlet, the pressure relief compensation module comprises a connecting hole communicated with the air inlet and an exhaust hole communicated with the outside, and the pressure relief compensation module is connected with the air inlet according to the air flow rate at the air inlet. And the flow rate of gas entering the connecting hole and the exhaust hole is controlled. Through the arrangement of the pressure relief compensation module, when the external air pressure is increased, the external air pressure can be effectively relieved, the flow rate of air entering the air inlet hole is prevented from being increased, the bearing range of the machine body to the external air pressure can be effectively enlarged, and the flow rate of the air in the machine body is prevented from exceeding the specified range.

The present invention relates to the technical field of heating, specifically a compressed gas heating system, which includes an intake pipe. The upper end of the intake pipe is connected and installed with an inner cylinder, and the cross-section of the inner cylinder is in the shape of a cone with a narrower lower part and a wider upper part. The upper end of the inner cylinder is connected and provided with an outlet pipe, and the cross-section of the outlet pipe is in the shape of a cone with a wider lower part and a narrower upper part. The upper end of the outlet pipe is connected and installed with a first connecting pipe. A heating element is arranged at the outer end of the inner cylinder. A flow guiding element is movably installed inside the intake pipe. A driving element is arranged at the outer end of the intake pipe, and the driving element is connected to the flow guiding element. This design realizes the mitigation of the trend of air pressure increase during the heating of compressed gas, effectively reduces the probability of the heating container cracking due to heating operations, and effectively guarantees the heating effect and safety.

The present application relates to a kind of exhaust pressure stabilizing safety valve body module, for solving the complex structure of the existing similar coffee machine pressure stabilizing, pressure relief, higher cost input, and when water tank has no water, the problem of not water after electromagnetic pump emptying.The valve body module includes multi-channel main body, exhaust assembly, the exhaust port of the inner passage of the multi-channel main body is provided with the exhaust assembly, the exhaust pin of exhaust assembly is slidingly limited in the inner end of exhaust port, exhaust pipe connector is sealingly fixed to the outer end of exhaust port, the spring is arranged between the inner end of exhaust pin and the inner end of exhaust pipe connector, the side of exhaust pin is provided with exhaust groove, under the initial action of spring, the inner end of exhaust pin and the inner end of exhaust port are abutted to form sealed state;When the inner end of exhaust pin is compressed by the pressure increase of the inner passage of multi-channel main body, the inner end of exhaust pin and exhaust port are unsealed, and part of gas-liquid in channel body is discharged through the exhaust groove in the side of exhaust pin and exhaust pipe connector.

Method for operating a fuel cell device (1) with a fuel tank (5), a fuel cell stack (2) and a fuel line (8) connecting the fuel tank (5) to the fuel cell stack (2), to which a plurality of injectors (13) is assigned, for the control of which a 2-point hysteresis controller (19) is provided, comprising the steps: a) Check whether the fuel cell stack (2) is operated in a lower load range for which the supply from only one of the injectors (13) is sufficient, b) in the event that the fuel cell stack (2) is operated in the lower load range, rolling control of the injectors, i.e. use of the first injector for the first hysteresis and successive use of one of the further injectors (13) for the further hystereses, until after all injectors (13) have been used, the first injector (13) is used again, c) temporal recording of the pressure increase for each injector (13) when it is put into use as a quality criterion for the fuel flow, d) Comparison of the pressure increases of the injectors (13), e) Issue a warning message if a difference between the pressure increases exceeds a specified or specifiable threshold.

The utility model relates to the technical field of secondary combustion chambers, in particular to a secondary combustion chamber emergency discharge device which comprises an emergency discharge port. When deflagration occurs in the secondary combustion chamber, the pressure in the connecting pipe is increased, gas flows into the first pressure relief box through the first through hole and the second through hole, the first sliding plate slides downwards, the second sliding plate slides upwards and the first spring is stretched under the action of the pressure, and when the pressure is still large, the gas enters the second pressure relief box through the third through hole; the third sliding plate slides leftwards, the pressure in the pressure relief connecting pipe passing through the pressure relief hole is reduced, if the pressure is rapidly increased, the third sliding plate continues to move leftwards to touch the touch-sensitive switch, and the touch-sensitive switch controls the alarm to sound to prompt a worker to open an emergency discharge door, so that the pressure in the connecting pipe can be relieved through the pressure relief hole; and meanwhile, when the pressure generated by deflagration is rapidly increased, the alarm can be controlled through the touch sensitive switch to sound to prompt workers, and the safety is high.

The power storage device includes a housing having a frame member and a power storage unit (power storage module) housed in the housing. The frame member is provided with an exhaust path that guides the gas discharged from the power storage unit to the outside of the housing. The exhaust path is provided with a blocking member (detection member) that blocks the exhaust path. The blocking member is configured to be broken by a pressure increase due to the gas discharged from the power storage unit.

The application discloses an air automatic pressure maintaining control method for an air cushion bin in a shield machine, and relates to an air automatic pressure maintaining control system composed of a control module, a detection module and an execution module. The control module controls the pressure of the air cushion bin in real time. The detection module is composed of a pressure sensor and a temperature sensor, and is responsible for real-time detection of the gas pressure value and temperature of the air cushion bin. The execution module is composed of a gas storage tank, an air inlet valve and an air outlet valve, and is responsible for air pressure increase and decrease of the air cushion bin. The application solves the problem of manual pressure adjustment in the air cushion bin according to experience, and enables the parameters of the controller to automatically switch with working conditions, so that dynamic adjustment is realized, the whole system is kept in an efficient and stable operation state, and the monopoly of foreign automatic pressure maintaining systems is broken.

The invention discloses a gas extraction drilling pipe network pressure relief early warning device and method.According to the gas extraction drilling pipe network pressure relief early warning method, when the situation that a pipe is blocked occurs, gas in the pipe is gathered, and then gas pressure is increased, and when the pressure is increased to the compression threshold value of a spring in a pressure relief early warning valve, the pressure relief early warning valve is started; the movable plug valve pushes the spring to move leftwards, the gas enters the pressure relief early warning valve, when the gas flows through the wind buzzer, the wind buzzer makes a sound for early warning, and when the gas continues to be pushed leftwards, the hinged cover can be blown open, the gas gathering pressure is released, and after the pressure in the pipe is lower than the compression threshold value of the spring in the pressure relief early warning valve, the gas enters the pressure relief early warning valve. The gas extraction early warning and pressure relief device has the advantages of being convenient to operate and good in pressure relief early warning effect, and the technical problem that an existing device is poor in economical efficiency and applicability due to the fact that the pressure relief early warning effect is poor is solved.